I had a Braun Vario for about 10 years. I threw away the whisk component about 3 years ago because I notice brown fluid running down the stem. I guess a seal had broken and water got into part of the mechanism. I have just thrown away the whole device because I noticed that the rubber ring around the blade has shrunk (from the heat of the dishwasher?) and allowed food to get in and go rotten. I can see from the pictures of the new Braun that the design has changed and I suspect that same problem won't happen again.